Question about Sony KP-57HW40 57" Rear Projection Television

1 Answer

My friend gave me this projection tv and it turns on for 5 seconds and then turns off. the red light blinks 5 times. can you help?

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  • vollan27 Jan 30, 2010

    thanks i do appreciate it.

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  • Sony Master
  • 5,807 Answers

Hi ,

Blinking 5 times means White Balance failure

Possible causes can be :


• Video out (IC7101, 7201, 7301) is faulty. (CR, CG, CB board)
•CRT drive (IC309) is faulty. (A board)
•G2 is improperly adjusted. (See Note 2)


Looking at the back of the TV

my friend gave me this - 01db356.jpg


the A board :




On the G BOARD ( Power Supply )

a ) .Confirm the voltage of TP +B 135V is less than 137.0Vdc.



it can also be checked here:

99ffea9.jpg





and don't forget to check Q8038 for short if there is no B+,

it is connected on pin one ( 1 ) of the flyback


Service Manual could be of much help to you if you can possibly

have one, only with a fee.


Let me know, if you needed further assistance.



Thank you for choosing FixYa for assistance. I hope that my

information proves useful to you. If so, please take a moment

to provide me with a positive rating. I'd really appreciate it.

Regards,


palaboy









Posted on Jan 30, 2010

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